It often happens that after prolonged use, your iPhone suddenly stops detecting a SIM card and starts to display a message about its absence. Most often this happens after the apparatus falls or some sharp shake occurs. Oddly enough, this problem is not so rare on Apple devices. Do not be afraid: if your iPhone does not see the SIM card, this does not mean that it has broken, most likely, it is just a small program malfunction, which is not difficult to fix.
The easiest ways to solve the problem
To get started, it is recommended to try just pulling out the SIM card and reinserting it into the device. If this is a normal temporary failure, then this technique should help. If the iPhone does not see the SIM card further, we try to reboot the device and check whether it turned out to fix the error. If the problem persists, then it is entirely possible that the cause of the error is not the device itself, but the SIM card. Find another one and try turning on the phone by installing it. If your iPhone works properly with another card, you can safely contact your operator for a free replacement.
Software Changes
If the previous tricks did not bring results, and the iPhone does not see the SIM card as before, we try to solve the problem with the help of changes in the software. For example, you can flash the device. If the iPhone does not see the SIM card after the update, try rolling the operating system back to the previous version. Most likely, these methods will help you bring your favorite smartphone back to life.
The most “dangerous” reasons
If none of the above methods helped you, it means that most likely your iPhone has stopped seeing the SIM card as a result of its incorrect use. Perhaps you are a fan of using a smartphone while taking a bath? This should be abandoned once and for all: evaporating, moisture can penetrate into the smallest cracks in the phone case and spoil the contacts on the microcircuits. It is possible that water has gotten into contact. Another serious reason why the iPhone does not see the SIM card may be its fall on the asphalt (or any hard surface) and damage to the SIM reader. In both of these cases, only experienced craftsmen in the service center can help you, you will have to hand over the phone for repair.
Apple device feature
Some manufacturers "sew up" in their device a special binding to a particular service provider. The device simply does not detect the remaining SIM cards. If your freshly bought iPhone is locked at the request of the company, then you have no choice but to return it to the store. Of course, you can purchase a special chip for unlocking, but it will still be easier to buy a device in another place that is not blocked for telecom operators. In order to avoid the occurrence of such problems, try to handle the smartphone carefully, do not let it fall, get wet or download suspicious applications. Be careful.